Dell EMC OpenStack Data Protection Extension 19.7 Installation and User Guide

OpenStack availability zones

OpenStack availability zones enable the cloud administrator to arrange OpenStack compute hosts into logical groups, and provides a form of physical isolation and redundancy from other availability zones, such as by using a separate power supply or separate network equipment.

The cloud administrator defines the availability zone in which a specified compute host resides locally on each server. An availability zone is commonly used to identify a set of servers that have a common attribute. For instance, if some of the racks in your data center are on a separate power source, you can put servers in those racks in their own availability zone. Availability zones can also help separate different classes of hardware.

When users provision resources, they can specify from which availability zone they want their instance to be built. This allows cloud consumers to ensure that their application resources are spread across disparate machines to achieve high availability in the event of hardware failure.